23040405 has 12 divisors (see below), whose sum is σ = 39936780. Its totient is φ = 12288192.

The previous prime is 23040403. The next prime is 23040427. The reversal of 23040405 is 50404032.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17690436 + 5349969 = 4206^2 + 2313^2 .

It is not a de Polignac number, because 23040405 - 2¹ = 23040403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23040403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 255960 + ... + 256049.

It is an arithmetic number, because the mean of its divisors is an integer number (3328065).

Almost surely, 2^23040405 is an apocalyptic number.

It is an amenable number.

23040405 is a deficient number, since it is larger than the sum of its proper divisors (16896375).

23040405 is a wasteful number, since it uses less digits than its factorization.

23040405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512020 (or 512017 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 23040405 is about 4800.0421873146. The cubic root of 23040405 is about 284.5531316432.

Adding to 23040405 its reverse (50404032), we get a palindrome (73444437).

The spelling of 23040405 in words is "twenty-three million, forty thousand, four hundred five".